X0306 4 2015-11-18 0 0001364962 IMPERVA INC IMPV 0001533486 Shaya Yaniv C/O IMPERVA, INC. 3400 BRIDGE PARKWAY, SUITE 200 REDWOOD SHORES CA 94065 0 1 0 0 Senior VP, Engineering Common Stock 2015-11-18 4 M 0 2500 28.57 A 25889 D Common Stock 2015-11-18 4 M 0 1562 32.79 A 27451 D Common Stock 2015-11-18 4 M 0 10313 34.55 A 37764 D Common Stock 2015-11-18 4 S 0 4448 71.01 D 33316 D Common Stock 2015-11-18 4 S 0 9927 71.75 D 23389 D Stock Option (Right to Buy) 28.57 2015-11-18 4 M 0 2500 0 D 2022-07-15 Common Stock 2500 3750 D Stock Option (Right to Buy) 32.79 2015-11-18 4 M 0 1562 0 D 2022-02-07 Common Stock 1562 0 D Stock Option (Right to Buy) 34.55 2015-11-18 4 M 0 10313 0 D 2023-02-04 Common Stock 10313 4687 D Represents a weighted average sales price per share. These shares were sold in multiple transactions at prices ranging from $70.5 to $71.49 per share. The Reporting Person has provided to the Issuer, and undertakes to provide to the staff of the Securities and Exchange Commission or any security holder of the Issuer, upon request, full information regarding the number of shares purchased at each separate price within the range. Represents a weighted average sales price per share. These shares were sold in multiple transactions at prices ranging from $71.54 to $71.99 per share. The Reporting Person has provided to the Issuer, and undertakes to provide to the staff of the Securities and Exchange Commission or any security holder of the Issuer, upon request, full information regarding the number of shares purchased at each separate price within the range. This Stock Option vests over four years of continuous service as follows: 25% of the underlying shares vest one year following the vesting commencement date of July 1, 2012 with the remaining 75% vesting in equal quarterly installments over the next three years. This stock option is subject to accelerated vesting in the event of a termination of employment of the Reporting Person under certain circumstances following a change in control of the Issuer. This Stock Option vests over three years of continuous service as follows: 25% of the underlying shares vest 27 months following the vesting commencement date of January 1, 2012, with the remaining 75% vesting in equal quarterly installments over the next nine months. This stock option is subject to accelerated vesting in the event of a termination of employment of the Reporting Person under certain circumstances following a change in control of the Issuer. This Stock Option vests over four years of continuous service as follows: 25% of the underlying shares vest one year following the vesting commencement date of January 1, 2013 with the remaining 75% vesting in equal quarterly installments over the next three years. This stock option is subject to accelerated vesting in the event of a termination of employment of the Reporting Person under certain circumstances following a change in control of the Issuer. /s/ Tram Phi, attorney-in-fact 2015-11-20